October and November sure seem like the weakest Fall I've seen since beginning to keep track of such things. I don't think it points toward any particular trend. A few Fall scheduled releases have been pushed into December, and the situation could very well be that the numbers are similar but with fewer titles than usual appealing to me personally. Perhaps some publishers are holding back books in the (farfetched) hope that the first year of the Sesquicentennial "celebrations" will significantly boost sales. Who knows. The good news is my previously huge review copy pile evaporated during this time, and the bad that I had to burn through my backlog of completed reviews I always save up over time for weeks when I don't feel like writing.
I should have my annual 'Best of the Year' list up soon, maybe as early as next week.